Schofield Barracks has an area of 17,725 acres (72 km2) on Central Oʻahu. The post was established in 1908 to provide mobile defense of Pearl Harbor and the entire island. It has been the home of the 25th Infantry Division, known as the Tropic Lightning Division, since 1941 as well as the Command Headquarters for United States Army Hawaii (USARHAW). Schofield Barracks is also home to the 8th Theater Sustainment Command. The population was 16,370 at the 2010 census.[2]

Schofield Barracks is located at 21°29′52″N158°3′48″W﻿ / ﻿21.49778°N 158.06333°W﻿ / 21.49778; -158.06333 (21.497650, -158.063248).[3] The Main Gate used to be off Wilikina Drive; however, now only the Foote and Lyman gates located along Kunia Road are used for controlled access. Proceeding north on Wilikina Road (State Rte. 99) leads to intersections with Kaukonahua Road (State Rte. 801) to Waialua and Kamehameha Highway (State Rte. 99) to Haleʻiwa. East on Wilikina leads to Interstate H-2 and Kamehameha Highway (State Rte.s 80 and 99) to Wahiawā and Mililani Town. Proceeding south on Kunia Road (State Route 750) past Schofield leads to the Kunia Gate on Wheeler, Kunia, and eventually Waipahu.

There were 2,965 households out of which 78.0% had children under the age of 18 living with them, 91.5% were married couples living together, 4.8% had a female householder with no husband present, and 2.1% were non-families. 2.0% of all households were made up of individuals and none had someone living alone who was 65 years of age or older. The average household size was 3.55 and the average family size was 3.58.

In the CDP the population was spread out with 32.1% under the age of 18, 29.8% from 18 to 24, 36.6% from 25 to 44, 1.4% from 45 to 64, and 0.1% who were 65 years of age or older. The median age was 22 years. For every 100 females there were 152.3 males. For every 100 females age 18 and over, there were 183.6 males.

The median income for a household in the CDP was $33,788, and the median income for a family was $32,970. Males had a median income of $21,112 versus $18,737 for females. The per capita income for the CDP was $12,316. About 6.7% of families and 7.2% of the population were below the poverty line, including 8.5% of those under age 18 and none of those age 65 or over.

The Main Post area consists of numerous quadrangle-style barracks and unit command structures, most of which have a letter designation. B and C Quads are the oldest, having been constructed in the 1920s, with D, E, and F quads being built later. Additionally on Main Post are the PX (post exchange), the Commissary, the "Aloha Building", the Library, Bowling Alley, and Uniform Clothing Store. Several sets of barracks have recently been constructed (the first set completed in 2000) adhering to a more stylish apartment-type setup. The Nehelani Club, Old Nehelani Club and Conroy Bowl are in the Main Post area as well.

Much of the housing on-post has been renovated or rebuilt now that the housing has been privatized. The enlisted housing area lies to the west of Main Post, while the officers' housing lies to the north along Wilikina Drive. Island Palms is the on-post housing company, which is part of Lend Lease, that is responsible for maintaining the units. The average wait time for housing is 2-6 months and up to one year for larger homes.

Area X and its environs constitute the bulk of the training areas on Schofield Barracks. Large open areas allow for air assault operations to take off and land. Covered concrete pads can provide shelter for units training in the area who do not wish to deal with sleeping in the field. The range control office as well as numerous semi-automated and other firing ranges are contained within this area as well.

The Land Navigation Course and designated training areas are laid out in this area to the east of the Main Post and the Enlisted Housing area. Typically, the bulk of the EIB train up and testing are done in this area.

Kolekole Road, which passes through the Enlisted Housing Area and West Post Training Area, leads up to a saddle named Kolekole Pass which allows vehicle traffic to flow between Schofield Barracks and Lualualei Naval Magazine as well as being an intermediate destination for physical training runs by soldiers stationed on Schofield Barracks.

The 25th Infantry Division Memorial consists of four statues, representing the division's soldiers who served in World War II, Korea, Vietnam, and the War on Terrorism (Afghanistan and Iraq). The first statue was unveiled in June 2005.